I was at a horse show and I had an apple. I was finished with it and gave the core to my horse. She ate it but then all of a sudden she started licking the air and the wood of the fence. Then her eyes rolled to the back of her head so you could only see the whites of her eyes for a moment. Then she coughed twice. I thought she may have had something stuck in her throat so I massaged her throat. She then stopped and started eating the hay that was in her pen. What could this have been? Has anyone expearienced something like that? I would greatly apreaciate if you answered! :) Thank you!